/*
* ProcImgSymInfo -- initialize symbolic information
*
* Note: This function should try to open files locally first, for two
* reasons:
* 1) If a local file is open as remote, then local caching may interfere with
* file operations (notably seeks with DIO_SEEK_CUR)
* 2) Remote access goes through extra layer of indirection; this overhead
* is completely unnecessary for local debugging.
*/
static bool ProcImgSymInfo( image_entry *image )
{
file_handle fh;
unsigned last;
char buff[TXT_LEN];
char *symfile_name;
const char *nopath;
size_t len;
image->deferred_symbols = false;
if( _IsOff( SW_LOAD_SYMS ) )
return( NO_MOD );
if( image->symfile_name != NULL ) {
last = DIP_PRIOR_MAX;
fh = PathOpen( image->symfile_name, strlen( image->symfile_name ), "sym" );
if( fh == NIL_HANDLE ) {
nopath = SkipPathInfo( image->symfile_name, OP_REMOTE );
fh = PathOpen( nopath, strlen( nopath ), "sym" );
if( fh == NIL_HANDLE ) {
/* try the sym file without an added extension */
fh = FileOpen( image->symfile_name, OP_READ );
}
}
} else {
last = DIP_PRIOR_EXPORTS - 1;
fh = FileOpen( image->image_name, OP_READ );
if( fh == NIL_HANDLE ) {
fh = FileOpen( image->image_name, OP_READ | OP_REMOTE );
}
}
if( fh != NIL_HANDLE ) {
if( CheckLoadDebugInfo( image, fh, DIP_PRIOR_MIN, last ) ) {
return( true );
}
FileClose( fh );
}
if( image->symfile_name != NULL )
return( false );
_AllocA( symfile_name, strlen( image->image_name ) + 1 );
strcpy( symfile_name, image->image_name );
symfile_name[ExtPointer( symfile_name, OP_REMOTE ) - symfile_name] = NULLCHAR;
len = MakeFileName( buff, symfile_name, "sym", OP_REMOTE );
_Alloc( image->symfile_name, len + 1 );
if( image->symfile_name != NULL ) {
memcpy( image->symfile_name, buff, len + 1 );
fh = FileOpen( image->symfile_name, OP_READ );
if( fh == NIL_HANDLE ) {
fh = FileOpen( image->symfile_name, OP_READ | OP_REMOTE );
}
if( fh == NIL_HANDLE ) {
fh = PathOpen( image->symfile_name, strlen( image->symfile_name ), "" );
}
if( fh != NIL_HANDLE ) {
if( CheckLoadDebugInfo( image, fh, DIP_PRIOR_MIN, DIP_PRIOR_MAX ) ) {
return( true );
}
FileClose( fh );
}
_Free( image->symfile_name );
}
image->symfile_name = NULL;
if( _IsOff( SW_NO_EXPORT_SYMS ) ) {
if( _IsOn( SW_DEFER_SYM_LOAD ) ) {
image->deferred_symbols = true;
} else {
fh = FileOpen( image->image_name, OP_READ | OP_REMOTE );
if( fh != NIL_HANDLE ) {
if( CheckLoadDebugInfo( image, fh, DIP_PRIOR_EXPORTS - 1, DIP_PRIOR_MAX ) ) {
return( true );
}
FileClose( fh );
}
}
}
return( false );
}
char *LoadTrap( char *trapbuff, char *buff, trap_version *trap_ver )
{
char *err;
char *parm;
char *end;
handle dh;
trap_file_header __far *head;
char init_error[256];
if( trapbuff == NULL ) {
trapbuff = DEFAULT_TRP_NAME;
}
end = strchr( trapbuff, PARM_SEPARATOR );
if( end == NULL ) {
end = &trapbuff[ strlen( trapbuff ) ];
parm = end;
} else {
parm = end + 1;
}
dh = PathOpen( trapbuff, end - trapbuff, DEFAULT_TRP_EXT );
if( dh == NIL_HANDLE ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, trapbuff );
return( buff );
}
err = ReadInTrap( GetSystemHandle( dh ) );
FileClose( dh );
if( err != NULL ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, trapbuff );
KillTrap();
return( buff );
}
err = SetTrapHandler();
if( err != NULL ) {
KillTrap();
return( err );
}
err = CopyEnv();
if( err != NULL ) {
KillTrap();
return( err );
}
head = MK_PM( TrapMem.s.rm, 0 );
if( head->sig != TRAP_SIGNATURE ) {
KillTrap();
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
return( buff );
}
PMData->initfunc.s.offset = head->init;
PMData->reqfunc.s.offset = head->req;
PMData->finifunc.s.offset = head->fini;
PMData->initfunc.s.segment = TrapMem.s.rm;
PMData->reqfunc.s.segment = TrapMem.s.rm;
PMData->finifunc.s.segment = TrapMem.s.rm;
if( !CallTrapInit( parm, init_error, trap_ver ) ) {
KillTrap();
strcpy( buff, init_error );
return( buff );
}
if( !TrapVersionOK( *trap_ver ) ) {
KillTrap();
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
return( buff );
}
TrapVer = *trap_ver;
ReqFunc = DoTrapAccess;
return( NULL );
}
